Methanation of carbon dioxide on ni catalysts on mesoporous ZrO2 doped with rare earth oxides

Nina Perkas, Galina Amirian, Ziyi Zhong, Jaclyn Teo, Yosef Gofer, Aharon Gedanken*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

About 20-40 mol% Ni/ZrO2 catalysts doped with Ce and Sm were synthesized by an ultrasound-assisted method and characterized by a number of physico-chemical methods (XRD, HR TEM, BET, XPS). It was demonstrated that the synthesized catalysts had a mesoporous structure, where ca. 10 nm size Ni nanoparticles were incorporated into the rare earth metal modified tetragonal zirconium oxide. The Ni particles formed during the reduction treatment could support the porous structure in the supports, and thus the porous properties of the catalysts were related to the Ni-loading. The maximum porous volume and size were obtained for the catalyst with a 30 mol% Ni loading, which coincidentally exhibited the highest catalytic activity for the methanation of CO2. After an oxidation-reduction pretreatment, the catalytic activity could be further improved. The increase in the catalytic activity was attributed to the formation of additional active centers on the catalysts' surface.

Original languageEnglish
Pages (from-to)455-462
Number of pages8
JournalCatalysis Letters
Volume130
Issue number3-4
DOIs
StatePublished - Jul 2009
Externally publishedYes

Keywords

  • Carbon dioxide methanation
  • Mesoporous structure
  • Nickel-zirconia catalyst
  • Rare earth doping
  • Sonochemical synthesis

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